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EN 1.3956 Stainless Steel vs. EN AC-42100 Aluminum

EN 1.3956 stainless steel belongs to the iron alloys classification, while EN AC-42100 aluminum belongs to the aluminum alloys. There are 25 material properties with values for both materials. Properties with values for just one material (7, in this case) are not shown. Please note that the two materials have significantly dissimilar densities. This means that additional care is required when interpreting the data, because some material properties are based on units of mass, while others are based on units of area or volume.

For each property being compared, the top bar is EN 1.3956 stainless steel and the bottom bar is EN AC-42100 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
70
Elongation at Break, % 27
3.4 to 9.0
Fatigue Strength, MPa 240
76 to 82
Poisson's Ratio 0.28
0.33
Shear Modulus, GPa 79
26
Tensile Strength: Ultimate (UTS), MPa 650
280 to 290
Tensile Strength: Yield (Proof), MPa 330
210 to 230

Thermal Properties

Latent Heat of Fusion, J/g 300
500
Maximum Temperature: Mechanical, °C 1080
170
Melting Completion (Liquidus), °C 1420
610
Melting Onset (Solidus), °C 1380
600
Specific Heat Capacity, J/kg-K 480
910
Thermal Expansion, µm/m-K 13
22

Otherwise Unclassified Properties

Base Metal Price, % relative 22
9.5
Density, g/cm3 7.8
2.6
Embodied Carbon, kg CO2/kg material 4.8
8.0
Embodied Energy, MJ/kg 68
150
Embodied Water, L/kg 180
1110

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 150
9.1 to 23
Resilience: Unit (Modulus of Resilience), kJ/m3 270
300 to 370
Stiffness to Weight: Axial, points 14
15
Stiffness to Weight: Bending, points 25
53
Strength to Weight: Axial, points 23
30 to 31
Strength to Weight: Bending, points 21
37 to 38
Thermal Shock Resistance, points 18
13

Alloy Composition

Aluminum (Al), % 0
91.3 to 93.3
Carbon (C), % 0 to 0.060
0
Chromium (Cr), % 20.5 to 23.5
0
Copper (Cu), % 0
0 to 0.050
Iron (Fe), % 51.9 to 62.1
0 to 0.19
Magnesium (Mg), % 0
0.25 to 0.45
Manganese (Mn), % 4.0 to 6.0
0 to 0.1
Molybdenum (Mo), % 1.5 to 3.0
0
Nickel (Ni), % 11.5 to 13.5
0
Niobium (Nb), % 0.1 to 0.3
0
Nitrogen (N), % 0.2 to 0.4
0
Phosphorus (P), % 0 to 0.040
0
Silicon (Si), % 0 to 1.0
6.5 to 7.5
Sulfur (S), % 0 to 0.030
0
Titanium (Ti), % 0
0 to 0.25
Vanadium (V), % 0.1 to 0.3
0
Zinc (Zn), % 0
0 to 0.070
Residuals, % 0
0 to 0.1